fix(import-dialog): keep long notice lists inside the viewport

Cap the import activities dialog content to the viewport height and allow the dialog content region to scroll. This keeps the Back and Import actions reachable when many import notices are rendered.

Document the fix in the changelog.

CHANGELOG.md

@@ -14,6 +14,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- Fixed the import activities dialog so long notice lists remain scrollable within the viewport
 - Improved the style of the activity type component
 
 ## 2.253.0 - 2026-03-06

apps/client/src/app/pages/portfolio/activities/import-activities-dialog/import-activities-dialog.scss

@@ -2,7 +2,9 @@
   display: block;
 
   .mat-mdc-dialog-content {
-    max-height: unset;
+    max-height: calc(100vh - 10rem);
+    min-height: 0;
+    overflow-y: auto;
 
     a {
       color: rgba(var(--palette-primary-500), 1);